diff --git a/lib/terminal.css b/lib/terminal.css
index a35d7b4..8a50e3d 100644
--- a/lib/terminal.css
+++ b/lib/terminal.css
@@ -431,7 +431,7 @@ p {
 }
 
 img {
-  width: 100%;
+  max-width: 100%;
 }
 
 .progress-bar {